Doris is investigating if height has any effect on red blood cell count. what is the explanatory variable?

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

How do i do this activity, is appreciated

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.